Urgent White spot on green leather soft coral

We are new enthusiasts, since late March. We've had no major issues. This afternoon, I noticed a white spot (nickel-sized) on the side of the green leather that seems to be causing it to tilt. I will try to post pics, please let me know what you think.

 

The pic will definitely help! Also post your water parameters, specially alkalinity, pH, ammonia and nitrates.

It sounds like it's dying, but it's hard to tell without the pic. Is this spot on the side of the stem or where?

 

There are different things it could be. I'm sure someone here will be able to help once a picture is posted.

 

it could be a sting mark, could be splitting, if dirty mucous sat on it or whatnot, a nudibranch.... so many things.... we need a picture!

 

I had trouble posting pics but will continue to try. The latest water parameters I have are 5/11/11:
pH: 7.8
NH: 0.25 ppm
Nitrite: 0 ppm
Nitrate: 0 ppm
We had a worm that we caught and discarded but there may be another one present. We have no fish, just hermit crabs and snails. We also have one frogspawn, an acan, an accordia(?), mushroom mix frag; they all appear to be doing fine.
Thanks for the input, again, I'll keep trying to get the pics uploaded.

 

IT could be ok, but we really need a picture. Leathers are very hardy so it probably still has a chance. Also the coral is not an accordia it is a ricordea
Good Luck and POST A PICTURE
JJL

 

Welcome to 3reef,

Photobucket account, is free, upload images from your computer to photobucket and paste the link into your post.

 

So.... what corals do you have close to the leather? Parameters seem fine except for your pH that is on the low side. 8 to 8.4 is usually preferred. If you add buffers, it can bring your alkalinity up quite a bit.
I did not see an alkalinity reading, if you have an alkalinity test kit, test the water and post the results too. My guess is that if you don't use buffers it will be on the low side, if you do use buffers, alkalinity will more than likely be higher.

 

Pictures by SlivaTank - Photobucket
I've not done this before, hope it works.

 

I can not see the growths on the leather in the images. Tank looks great though.

I have had a lot of leather corals and I can not think of what it may be that is nickle sized and showed up over night. They do get patches of algae growth but they do not make them tilt, usually that is related to flow or acclimation.

Sorry I could not be of more assistance.

Curious do you have any new snails like Nerite?